The Matsés, also known as Mayoruna, live along the Javari River and its tributaries straddling the remote region between the borders of Brazil and Peru and number roughly 2,500. Most Matsés today meet all their nutritional needs through traditional subsistence activities including hunting, fishing, trapping, swidden horticulture, and collection of wild foods. The health of the Matsés tribe has always depended on the knowledge and wisdom of their elders. Once extinguished, this knowledge, along with their self-sufficiency, will be lost and can never be fully reclaimed.